23641440 has 48 divisors (see below), whose sum is σ = 74472048. Its totient is φ = 6304256.

The previous prime is 23641433. The next prime is 23641451. The reversal of 23641440 is 4414632.

23641440 = 576² + 577² + ... + 639².

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23641440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24147 + ... + 25106.

It is an arithmetic number, because the mean of its divisors is an integer number (1551501).

Almost surely, 2^23641440 is an apocalyptic number.

23641440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23641440 is an abundant number, since it is smaller than the sum of its proper divisors (50830608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23641440 is a wasteful number, since it uses less digits than its factorization.

23641440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49271 (or 49263 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 23641440 is about 4862.2463944148. The cubic root of 23641440 is about 287.0062198428.

The spelling of 23641440 in words is "twenty-three million, six hundred forty-one thousand, four hundred forty".